In general, the further you move down the tree, the higher percentage of the doodle is poodle. This means that the dog is more likely to have poodle like hair, be nonshedding, and need regular grooming.
But please remember that genetics can be random and sometimes puppies will take on the dominant traits of either Poodle, Golden Retriever, or Labrador Retriever no matter what label of generation. We have had super curly coats and flat coats come from lines that surprised us even after reviewing DNA tests. Below are some family trees explaining the generations and photos comparing different coats we have seen.
The Labradoodle Family Tree:
The English Goldendoodle Family Tree:
All of the above dogs are labradoodles, representing different generations. If you are looking for a specific coat- flat or curly- feel free to screenshot a picture of a dog on my website and send me a picture so we can arrange to best meet your needs and wants.
We use the terms flat and curly coats to explain the two variations in hair doodles typically have. However, there is a spectrum of hair types and determining the types of hair an adult dog will have based on their puppy coat is not a science. We can only go off of experience, past litters, and generational information.